| HS Code | 611840 |
| Density | 0.920 g/cm³ |
| Melt Flow Index | 2.0 g/10 min (190°C/2.16 kg) |
| Melting Point | 122 °C |
| Tensile Strength At Yield | 13 / 12 MPa |
| Tensile Strength At Break | 36 / 34 MPa |
| Elongation At Break | 800 / 850 % |
| Dart Drop Impact | 150 g |
| Haze | 12 % |
| Gloss | 45 units |
| Vicat Softening Point | 100 °C |
As an accredited Luban LLDPE DFDC-7050 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Luban LLDPE DFDC-7050 is supplied as virgin pellets in 25 kg moisture-resistant bags, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | Luban LLDPE DFDC-7050 is packed in 25 kg bags, loaded into a 20′ FCL container for safe, efficient transport. |
| Shipping | Luban LLDPE DFDC-7050 is supplied as free-flowing pellets in moisture-protective woven bags, 25 kg each, or in bulk for container transport. Shipment must be kept dry, shaded, and well-ventilated, avoiding temperatures above 50°C. Handle gently to prevent bag damage and protect product quality during transit. |
| Storage | Store Luban LLDPE DFDC-7050 in a clean, dry, well-ventilated warehouse away from direct sunlight, rain, and excessive heat. Keep containers sealed and protect from moisture and contamination. No special handling hazards exist under normal conditions, but avoid open flames and strong oxidizers. Maintain moderate temperatures and good stock rotation. |
| Shelf Life | Shelf life is 12 months from manufacture if stored unopened in a cool, dry place away from direct sunlight. |
For agricultural greenhouse film and low-tunnel cladding, Luban DFDC-7050 is a butene-based LLDPE with a nominal density of 0.918 g/cm³ and a melt flow rate of 2.0 g/10 min under ISO 1133-1 at 190 °C/2.16 kg. It is typically formulated on the converter floor by dry-blending 2.0–4.0 wt% of a PE-based UV stabiliser masterbatch, containing 10–20% hindered amine light stabiliser, with 0.5–1.0 wt% of an anti-fogging masterbatch and, when film thickness is reduced below 30 µm, 10–20 wt% of a metallocene LLDPE to maintain dart impact resistance. The blend is fed to a single-screw blown-film line with a 25:1–30:1 L/D barrier screw and a die gap of 1.5–2.0 mm. Melt temperature is held between 190 °C and 215 °C, the blow-up ratio is set at 2.0:1–2.8:1, and the frost line height is maintained at 6–10 die diameters; these parameters control orientation balance and free-shrink development. Output is referenced in kg per die circumference per hour, with the film drawn to 25–50 µm. Finished greenhouse film is assessed according to EN 13206:2017 for agricultural and horticultural films, tensile properties according to ISO 527-3, and accelerated weathering according to ASTM G154 or an equivalent contractual specification. Compliance for the European market requires that all stabilisers and processing aids meet REACH registration under Regulation (EC) No 1907/2006 and that none of the masterbatch components appears on the Candidate List as a Substance of Very High Concern. The terminal products are multi-season greenhouse cladding, low-tunnel film, and perforated mulch film.
Extruding Luban DFDC-7050 at heavy-duty sack thicknesses of 80–150 µm shifts the process bottleneck from melt strength to bubble cooling, collapse-frame friction, and gauge-band control. On production lines, the die gap is widened to 2.0–2.5 mm, the melt temperature is kept at 195–210 °C, and the blow-up ratio is limited to 1.8:1–2.2:1 because higher blow-up ratios can amplify low-frequency gauge variation in thick webs. Internal bubble cooling is usually required; without IBC, frost line height is typically set at 8–12 die diameters to avoid bubble sag and side-to-side temperature asymmetry. The formulation is adjusted with 3–8 wt% LDPE to increase melt strength and 2–4 wt% carbon black masterbatch for opacity and UV resistance in outdoor debris bags; for food-contact sack liners, carbon black is replaced by a compliant white masterbatch. Tear resistance and impact are critical at this thickness: trouser tear is measured according to ISO 6383-1, dart impact according to ISO 7765-1 Method A, and gauge thickness is monitored with a non-contact capacitive gauge to hold tolerance within ±5%. Terminal articles include valve sacks, FIBC inner liners, construction debris bags, and heavy-duty retail sacks. In the EU, food-contact sack liners fall under Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm² when tested according to EN 1186-1; in the US, the olefin polymer may comply with 21 CFR 177.1520 if the end-use additive package is cleared.
Cast stretch film operations that use DFDC-7050 as a core-layer diluent at 10–20 wt% are governed less by bubble stability than by prestretch uniformity and cling-force retention. In a 23 µm A/B/A machine film, the core layer is a blend of DFDC-7050 and metallocene LLDPE, while the skins contain polyisobutylene-based cling agents; the core addition is held at the lower end of the range when the line runs at prestretch levels above 250%. Cast extrusion is performed with a slot die having a die gap of 0.5–0.8 mm, a chill roll temperature of 20–30 °C, and winding speeds that can exceed 400 m/min. Processors monitor peel cling force by ASTM D5458 and puncture propagation tear resistance by ASTM D5748 to ensure the film withstands corner stresses during transport. Because butene-based LLDPE has lower ultimate stretch than octene-based copolymers, the core-layer addition is intentionally restricted to avoid film breaks at high prestretch; published data for this specific DFDC-7050 configuration is limited, so pilot-line confirmation is required. Industrial pallet wrap does not require food-contact clearance, but the resin and additives must be registered under REACH Regulation (EC) No 1907/2006 and must not be listed as Substances of Very High Concern. Terminal products are hand-applied machine pallet wrap and extended-core stretch wrap.
| Downstream segment | Critical blend / addition | Process window | Thickness / temperature or line speed | Primary compliance or test reference |
|---|---|---|---|---|
| Greenhouse film | 2.0–4.0 wt% UV MB + 0.5–1.0 wt% anti-fog; 10–20 wt% mLLDPE below 30 µm | Die gap 1.5–2.0 mm, BUR 2.0:1–2.8:1 | 25–50 µm, 190–215 °C | EN 13206:2017, ISO 527-3, REACH |
| Heavy-duty sacks | 3–8 wt% LDPE + 2–4 wt% carbon black MB | Die gap 2.0–2.5 mm, BUR 1.8:1–2.2:1 | 80–150 µm, 195–210 °C | ISO 6383-1, ISO 7765-1, EU 10/2011 if food |
| Cast stretch core | 10–20 wt% DFDC-7050 core; cling-agent skins | Slot die 0.5–0.8 mm, chill roll 20–30 °C | 23 µm, 400 m/min line speed | ASTM D5458, ASTM D5748, REACH |
For frozen food bags and lidding film, DFDC-7050 is coextruded or blended with 15–25 wt% LDPE and 5–10 wt% of a metallocene plastomer to lower the seal initiation temperature; butene-based LLDPE typically seals at temperatures above 100 °C, whereas freezer films require heat-seal strength above 0.5 N/mm at temperatures below 95 °C. The blown film process uses a die gap of 1.5–2.0 mm, a blow-up ratio of 2.2:1–2.8:1, and a thickness of 40–70 µm. Slip and antiblock additives are limited: erucamide concentration is kept below 0.06 wt% in food-contact sealing layers because migration to the seal interface can reduce seal strength and increase coefficient-of-friction variability. The film is tested for dart impact at -20 °C by ISO 7765-1 Method A, seal strength by ASTM F88/F88M-21, and haze by ISO 14782. Compliance for frozen food packaging in the EU is Regulation (EU) No 10/2011 with overall migration below 10 mg/dm²; in the US, 21 CFR 177.1520 applies to the olefin polymer, provided the antioxidant, slip, and antiblock additives are cleared for the intended use. Terminal articles include frozen vegetable bags, poultry ice-glaze liners, and lidding for snap-freeze trays.
High-output can-liner and retail produce-bag lines that draw Luban DFDC-7050 down to 15–25 µm encounter a non-linear decline in dart impact and a marked anisotropy in tear resistance. The film is processed at 180–200 °C with a polymer processing aid masterbatch at 400–800 ppm to suppress melt fracture, a die gap of 1.0–1.5 mm, and a blow-up ratio of 2.5:1–3.5:1 to shift orientation toward the transverse direction. At 25 µm, addition of 10–20 wt% metallocene LLDPE is commonly needed to keep dart impact above 60 g under ISO 7765-1 Method A; without this addition, film at thin gauge may fall below the user specification for puncture during refuse compaction. Machine direction tear is measured by ISO 6383-1, and the MD/TD tear ratio is monitored as an indicator of downgauging tolerance. Gauge control uses a dual-lip air ring and internal bubble cooling, with target thickness variation below ±4%. The terminal products are refuse can liners, retail produce bags, and over-wrappers for light consumer goods. Compliance for heavy metal content in packaging falls under EU Packaging Directive 94/62/EC, which limits the sum of lead, cadmium, mercury, and hexavalent chromium to 100 mg/kg; US applications may reference CONEG toxics-in-packaging legislation.
In secondary containment and pond liner film, DFDC-7050 is blended with 20–30 wt% high-density polyethylene and 2–4 wt% carbon black masterbatch, because the butene LLDPE alone lacks the required secant modulus and long-term creep resistance. The compound is processed on a blown-film line with a 30:1 L/D grooved-feed extruder, a die gap of 1.8–2.4 mm, and a blow-up ratio of 1.5:1–2.0:1 to produce film thicknesses from 200–500 µm. After lay-flat rolling, the film is corona- or flame-treated to a minimum surface energy of 38 mN/m; otherwise hot-wedge or hot-air seam strength tested by ASTM D6392-12 can drop below 70% of parent-material strength. Carbon black dispersion is checked by optical microscopy on microtomed sections to reduce agglomerate-induced pinholes. The terminal products are single-ply pond liners, temporary landfill covers, and secondary containment film. Because DFDC-7050 is a film grade rather than a dedicated geomembrane resin, the converted sheet must be qualified against project-specific technical specifications, which may reference GRI-GM13 or GRI-GM17; compliance with REACH Regulation (EC) No 1907/2006 and, where applicable, EU Construction Products Regulation (EU) No 305/2011 must be confirmed by the converter.
| Application segment | Regulatory / compliance reference | Critical test methods | Operational boundary |
|---|---|---|---|
| Greenhouse film | EN 13206:2017, REACH | ISO 527-3, ASTM G154 | UV masterbatch must be SVHC-free; multi-season field performance must be supplier-qualified |
| Heavy-duty sacks | EU 10/2011, FDA 21 CFR 177.1520 if food | ISO 6383-1, ISO 7765-1 | Food-contact carbon black replaced by cleared white masterbatch |
| Cast stretch core | REACH only | ASTM D5458, ASTM D5748 | No direct food-contact; pilot-line validation required above 250% prestretch |
| Freezer film | EU 10/2011, FDA 21 CFR 177.1520 | ASTM F88/F88M-21, ISO 7765-1 at -20 °C | Erucamide below 0.06 wt% in seal layer |
| Can liners | EU 94/62/EC, CONEG | ISO 7765-1, ISO 6383-1 | 10–20 wt% mLLDPE needed at 25 µm for dart impact |
| Geomembrane | REACH, EU 305/2011 where applicable | ASTM D6392-12 | DFDC-7050 is a film grade; not a direct drop-in geomembrane resin |
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Luban LLDPE DFDC-7050 is a butene-copolymer linear low density polyethylene film extrusion resin manufactured by OQ under the Luban polyethylene portfolio. The grade is identified by a nominal density of 0.918 g/cm³ when measured according to ISO 1183-1 and a nominal melt flow rate of 2.0 g/10 min at 190 °C under a 2.16 kg load according to ISO 1133-1. These values place the product in the medium-flow butene-LLDPE class for general-purpose blown film rather than high-puncture or high-clarity specialty packaging. The primary molecular distinction is the use of 1-butene as the comonomer; this yields a different short-chain branching distribution than hexene- or octene-based LLDPE grades and directly influences dart drop impact, Elmendorf tear, and melt processing characteristics. The resin is not a high-clarity grade; finished film haze is governed by die gap, frost line height, and blend composition rather than by the base resin alone.
The comonomer type is the dominant architectural variable. In a butene LLDPE such as DFDC-7050, the short-chain branch length is two carbons shorter than the hexene analogue, and the branch distribution under a given catalyst system tends to concentrate in the low-molecular-mass fraction. This reduces the concentration of tie chains bridging crystal lamellae and therefore reduces slow-crack growth resistance and impact toughness relative to hexene LLDPE at the same density and melt flow rate. However, the same architecture decreases melt elasticity and die swell, which is beneficial in blown film bubble geometry control at high draw-down ratios. The difference is most pronounced at film thicknesses below 30 µm, where the deformation mode shifts from plane-strain to biaxial tension and chain disentanglement governs failure.
Melt temperature, die gap, and blow-up ratio are the primary processing variables controlling bubble stability and gauge uniformity. In blown film extrusion, DFDC-7050 is typically processed at barrel temperatures from 170 °C to 210 °C, with adapter and die temperatures maintained between 180 °C and 220 °C. A die gap of 1.2 mm to 2.0 mm is used with blow-up ratios of 2.0:1 to 3.0:1; lower blow-up ratios favor machine-direction tear, while higher blow-up ratios shift orientation and can reduce dart drop if frost line height is not adjusted. Frost line height should be held above 6 die diameters to stabilize the bubble and below 10 die diameters to prevent excessive crystallinity-driven loss of transverse-direction tear. Extruders with 24:1 to 30:1 L/D and single-flighted barrier screws are generally suitable. A 75 mm grooved-feed extruder at 30:1 L/D is representative for production lines running monolayer film. On lines equipped with internal bubble cooling and segmented air rings, throughput per die diameter typically exceeds simple air-ring-cooled systems; DFDC-7050 permits stable internal bubble pressure at blow-up ratios up to 3.0:1. Prolonged residence time above 230 °C can generate oxidized gels detectable as specks in clear film; melt temperatures below 175 °C increase die-head pressure and can produce visible melt fracture at high output rates.
Across thin-gauge carrier bags and industrial liners, DFDC-7050 is processed at film thicknesses from 20 µm to 150 µm. The grade adjusts well to monolayer general-purpose structures; in coextrusion it is placed in core or skin layers where its viscosity matches polyolefin tie and LDPE seal layers. To improve melt clarity and reduce die-lip deposits, fluoropolymer processing aids may be added at 200 ppm to 1000 ppm, but the user should verify masterbatch compatibility by measuring die-head pressure and film haze under ASTM D1003-13. The resin is not hygroscopic; only surface condensation from cold storage must be removed. Pellets exposed to liquid water should be dried at 70 °C for 2 h; drying temperatures above 80 °C can cause pellet sintering and feeding interruptions.
Published technical data for DFDC-7050 lists tensile yield in machine and transverse directions at 11 MPa under ASTM D882-18; elongation at break is normally above 500 %, but the exact lot-to-lot value may vary within the producer’s release limits. Dart drop impact and Elmendorf tear values are product-specific and should be taken from the manufacturer’s certificate of analysis. Because the density is 0.918 g/cm³, the grade provides lower secant modulus than high-density film grades and higher stiffness than very-low-density resins below 0.910 g/cm³. The melt flow rate of 2.0 g/10 min is higher than conventional 0.5–1.0 g/10 min heavy-duty sack grades; therefore DFDC-7050 is selected when throughput and bubble stability take precedence over maximum puncture resistance.
The substitution into LDPE-dominant formulations is usually conducted at 10 wt% to 30 wt% letdown of DFDC-7050. The addition of the butene-LLDPE increases Elmendorf tear and dart drop relative to a pure autoclave LDPE film of the same gauge, but reduces gloss and increases haze. Melt-index mismatch between a 0.25-MFI or 0.5-MFI LDPE and the 2.0-MFI LLDPE can create interfacial instability in coextruded layers if the viscosity ratio at the die lip exceeds approximately 1.5×; this is typically corrected by increasing die temperature 5 °C to 10 °C or by adding a low-viscosity PE wax to the skin layer. The resin’s higher melt index also permits use at reduced extruder melt temperature relative to low-MFI LLDPE grades, lowering motor load and allowing line-speed increases where film cooling capacity is sufficient.
Rheologically, the 2.0 g/10 min melt index corresponds to a melt viscosity in the range of 800 Pa·s to 1500 Pa·s at 190 °C and a shear rate of 100 s⁻¹ for similar linear low density polyethylenes; the exact DFDC-7050 value depends on molecular weight distribution and additive package. At typical die lip shear rates of 100 s⁻¹ to 600 s⁻¹, the grade is more shear-thinning than a metallocene LLDPE of the same melt index, which reduces head pressure in narrow die gaps. This permits die gaps as low as 1.0 mm on high-pressure lines. If the die gap is reduced below 0.8 mm, melt fracture may onset earlier, and a processing aid should be introduced.
For low-temperature abuse resistance, hexene- and octene-based LLDPE grades with equivalent melt index generally deliver higher dart impact and slow-rate puncture resistance than butene-LLDPE at the same density. The short-chain branching length of 1-hexene is greater than that of 1-butene, producing a more effective tie-molecule network between lamellae. In converter trials, switching from a butene LLDPE of density 0.918 g/cm³ to a hexene LLDPE of the same nominal density can raise dart drop impact by 20 % to 60 %, with the largest improvement observed at film gauges below 50 µm. DFDC-7050 should not be specified for high-abuse frozen-food packaging at -20 °C or for puncture-critical stretch film unless the finished structure is validated under ASTM D5748 puncture resistance. Published direct comparative data for DFDC-7050 against specific hexene grades under identical blown film conditions are limited; converter trials therefore remain the authoritative basis for downgauging decisions.
Against very-low-density polyethylene grades below 0.910 g/cm³, DFDC-7050 has higher secant modulus and lower cling force; against high-density polyethylene film resins above 0.940 g/cm³, it has lower tensile yield and greater elongation. Compared with metallocene LLDPE grades of equivalent density, DFDC-7050 has a broadened molecular weight distribution, which typically results in lower extruder torque at the same screw speed and easier bubble control, but it also may produce higher seal initiation temperature and lower hot-tack strength. These differences define the grade as a commodity butene-LLDPE intended for general-purpose film where high optical clarity and extreme toughness are not primary performance requirements.
Surface slip and antiblock additives in DFDC-7050 films follow diffusion-limited migration to the film surface; coefficient-of-friction values measured under ASTM D1894-14 change during the first 24 h to 72 h after extrusion as erucamide or oleamide migrates. Packaging lines that use high-speed form-fill-seal equipment should not evaluate sealability or blocking before this additive bloom period is complete. For monolayer films, the use of silica-based antiblock at 1000 ppm to 5000 ppm reduces blocking but may lower dart impact by 5 % to 15 % depending on particle size distribution.
In coextruded structures, DFDC-7050 is often placed as a core layer between LDPE or EVA skins. The moderate density of 0.918 g/cm³ provides enough melt strength for bubble support, while the 2.0 g/10 min melt index allows low melt temperature and fast line speed. If the resin is used in a skin layer, film haze may exceed 8 % to 12 % depending on die gap and cooling rate, which is higher than metallocene LLDPE skins. For that reason, high-clarity packaging uses DFDC-7050 only as an internal layer or blend component.
Batch-to-batch control is monitored by melt flow rate and density; converters should request certificate of analysis values for each lot. Gauge variation on blown film lines is typically controlled by automatic air rings and capacitance thickness scanners; DFDC-7050 permits gauge spreads within ±2 % to ±5 % on lines with effective air ring control. Dart drop and Elmendorf tear should be sampled after the film has conditioned at 23 °C and 50 % relative humidity for at least 24 h per ASTM D618 to avoid moisture and annealing artefacts.
Heat-seal initiation for DFDC-7050 occurs at a higher temperature than for ultra-low-density ethylene-vinyl acetate copolymers; packaging lines should set seal-bar temperatures based on hot-tack and seal-strength curves generated under ASTM F1921-18 and ASTM F88/F88M-15. The seal strength of a 30 µm monolayer film typically reaches plateau once the seal-bar interface temperature exceeds the melting point by 5 °C to 15 °C. For coextruded structures, the sealant layer controls the thermal sealing behavior; DFDC-7050 in the core or skin does not contribute to seal initiation if it is not the sealing surface.
DFDC-7050 as supplied does not contain sufficient UV stabilizer for long-term agricultural exposure; greenhouse film and silage covers require converter-added HALS packages validated under ASTM G154-16 or ISO 4892-2:2013. Without stabilization, outdoor exposure causes chain scission and loss of elongation at break within 3–6 months in high-UV climates; the exact lifetime depends on film thickness, pigment, and light intensity. Carbon black masterbatch at 2 wt% to 3 wt% is common for mulch and silage films to extend weatherability, but increases gauge and reduces tear.
Compliance documentation for DFDC-7050 is application-specific and must be confirmed by the converter for the finished film structure. The base polymer can be classified under the olefin polymer scope of FDA 21 CFR 177.1520(c) when supported by appropriate lot testing and manufacturer certification; the technical data sheet alone does not constitute food-contact approval. For European food-contact use, the finished multilayer film must satisfy EU Regulation No 10/2011 overall migration limits of 10 mg/dm² under the intended contact conditions. REACH and RoHS obligations depend on the final article composition, including additives and colorants, and should be addressed by the downstream converter. Storage should be in closed silos or original packaging at temperatures below 40 °C and protected from UV and direct water contact. Additive packages containing high levels of migratory amines may alter surface slip and cold-seal behavior; masterbatch compatibility should be evaluated at the planned letdown ratio by measuring coefficient of friction under ASTM D1894-14 after 24 h of aging. The resin should not be processed with peroxide-based visbreaking masterbatches; uncontrolled melt-flow increase beyond 4.0 g/10 min and gel formation may result. If stored outdoors in white bags, internal temperature can exceed 40 °C and cause pellet agglomeration under sustained sunlight.
